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Activated Carbon Filters – Adsorption not Absorption

Activated Carbon Filters – Adsorption not Absorption
Jaime Graymead
March 20, 2024

When we talk about how an Activated Carbon Filter works we use the word “Adsorption” to describe the process of molecules being removed from the air stream.  However, we often hear the more common word “Absorption” incorrectly used.

What is the difference between Adsorption and Absorption?

Adsorption

Is a process where atoms, ions or molecules from a gas, liquid or solid, stick or adhere to the surface of a material.  eg.  Activated Carbon Filter.

Absorption

Is a process where atoms, ions or molecules are drawn into or soak into a material. e.g. sponges or paper towels, taking on water.

Adsorption

Absorption - Sponge

Activated Carbon Filters

Airclean offers activated carbon filters in various styles, primarily as bonded panel filters. Multiple panels can be combined to form a carbon discarb filter cell for high carbon loading and increased airflow support. For odour control at lower levels, activated carbon impregnated media are available in both traditional bag filters and rigid bag filters.

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